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| Common Name | Scientific Name | Order | Family | Genus | Species | Author | notes |
|---|---|---|---|---|---|---|---|
| incense-cedar wasp | Syntexis libocedrii Rohwer | HYMENOPTERA | Anaxyelidae | Syntexis | libocedrii | Rohwer | |
| Indianmeal moth | Plodia interpunctella (Hübner) | LEPIDOPTERA | Pyralidae | Plodia | interpunctella | (Hübner) | |
| indiscriminate cuckoo bumble bee | Bombus insularis (Smith) | HYMENOPTERA | Apidae | Bombus | insularis | (Smith) | |
| inornate scale | Aonidiella inornata McKenzie | HEMIPTERA | Diaspididae | Aonidiella | inornata | McKenzie | |
| insidious flower bug | Orius insidiosus (Say) | HEMIPTERA | Anthocoridae | Orius | insidiosus | (Say) | |
| introduced basswood thrips | Thrips calcaratus Uzel | THYSANOPTERA | Thripidae | Thrips | calcaratus | Uzel | |
| introduced pine sawfly | Diprion similis (Hartig) | HYMENOPTERA | Diprionidae | Diprion | similis | (Hartig) | |
| io moth | Automeris io (Fabricius) | LEPIDOPTERA | Saturniidae | Automeris | io | (Fabricius) | |
| iris borer | Macronoctua onusta Grote | LEPIDOPTERA | Noctuidae | Macronoctua | onusta | Grote | |
| iris thrips | Iridothrips iridis (Watson) | THYSANOPTERA | Thripidae | Iridothrips | iridis | (Watson) | |
| iris weevil | Mononychus vulpeculus (Fabricius) | COLEOPTERA | Curculionidae | Mononychus | vulpeculus | (Fabricius) | |
| Italian pear scale | Epidiaspis leperii (Signoret) | HEMIPTERA | Diaspididae | Epidiaspis | leperii | (Signoret) | |
| itch mite | Sarcoptes scabiei (De Geer) | ACARI | Sarcoptidae | Sarcoptes | scabiei | (De Geer) | |
| ivy aphid | Aphis hederae Kaltenbach | HEMIPTERA | Aphididae | Aphis | hederae | Kaltenbach | |
| jack pine budworm | Choristoneura pinus Freeman | LEPIDOPTERA | Tortricidae | Choristoneura | pinus | Freeman | |
| jack pine sawfly | Neodiprion pratti banksianae Rohwer | HYMENOPTERA | Diprionidae | Neodiprion | pratti banksianae | Rohwer | |
| jack pine tip beetle* | Conophthorus resinosae Hopkins | COLEOPTERA | Curculionidae | Conophthorus | resinosae | Hopkins | *Also called red pine cone beetle |
| Japanese beetle | Popillia japonica Newman | COLEOPTERA | Scarabaeidae | Popillia | japonica | Newman | |
| Japanese broadwinged katydid | Holochlora japonica Brunner von Wattenwyl | ORTHOPTERA | Tettigoniidae | Holochlora | japonica | Brunner von Wattenwyl | |
| Japanese grasshopper | Oxya japonica (Thunberg) | ORTHOPTERA | Acrididae | Oxya | japonica | (Thunberg) | |
| Jeffrey pine beetle | Dendroctonus jeffreyi Hopkins | COLEOPTERA | Curculionidae | Dendroctonus | jeffreyi | Hopkins | |
| Jerusalem cricket | Stenopelmatus fuscus Haldeman | ORTHOPTERA | Stenopelmatidae | Stenopelmatus | fuscus | Haldeman | |
| juniper midge | Contarinia juniperina Felt | DIPTERA | Cecidomyiidae | Contarinia | juniperina | Felt | |
| juniper scale | Carulaspis juniperi (Bouch | HEMIPTERA | Diaspididae | Carulaspis | juniperi | (Bouch | |
| juniper tip midge | Oligotrophus betheli Felt | DIPTERA | Cecidomyiidae | Oligotrophus | betheli | Felt | |
| juniper webworm | Dichomeris marginella (Fabricius) | LEPIDOPTERA | Gelechiidae | Dichomeris | marginella | (Fabricius) | |
| Kamehameha butterfly | Vanessa tameamea Eschscholtz | LEPIDOPTERA | Nymphalidae | Vanessa | tameamea | Eschscholtz | |
| keyhole wasp | Pachodynerus nasidens (Latreille) | HYMENOPTERA | Vespidae | Pachodynerus | nasidens | (Latreille) | |
| khapra beetle | Trogoderma granarium Everts | COLEOPTERA | Dermestidae | Trogoderma | granarium | Everts | |
| kiawe bean weevil | Algarobius bottimeri Kingsolver | COLEOPTERA | Chrysomelidae | Algarobius | bottimeri | Kingsolver | |
| kiawe flower moth | Ithome concolorella (Chambers) | LEPIDOPTERA | Cosmopterigidae | Ithome | concolorella | (Chambers) | |
| kiawe roundheaded borer | Placosternus crinicornis (Chevrolat) | COLEOPTERA | Cerambycidae | Placosternus | crinicornis | (Chevrolat) | |
| kiawe scolytid | Hypothenemus birmanus (Eichhoff) | COLEOPTERA | Curculionidae | Hypothenemus | birmanus | (Eichhoff) | |
| Kirkaldy whitefly | Dialeurodes kirkaldyi (Kotinsky) | HEMIPTERA | Aleyrodidae | Dialeurodes | kirkaldyi | (Kotinsky) | |
| Klamathweed beetle | Chrysolina quadrigemina (Suffrian) | COLEOPTERA | Chrysomelidae | Chrysolina | quadrigemina | (Suffrian) | |
| koa bug | Coleotichus blackburniae White | HEMIPTERA | Scutelleridae | Coleotichus | blackburniae | White | |
| koa haole seed weevil | Araecerus levipennis Jordan | COLEOPTERA | Anthribidae | Araecerus | levipennis | Jordan | |
| koa moth | Scotorythra paludicola (Butler) | LEPIDOPTERA | Geometridae | Scotorythra | paludicola | (Butler) | |
| koa seedworm | Cryptophlebia illepida (Butler) | LEPIDOPTERA | Tortricidae | Cryptophlebia | illepida | (Butler) | |
| kou leafworm | Ethmia nigroapicella (Saalm) | LEPIDOPTERA | Oecophoridae | Ethmia | nigroapicella | (Saalm) | |
| Lange metalmark | Apodemia mormo langei Comstock | LEPIDOPTERA | Riodinidae | Apodemia | mormo langei | Comstock | |
| lantana cerambycid | Plagiohammus spinipennis Thomson | COLEOPTERA | Cerambycidae | Plagiohammus | spinipennis | Thomson | |
| lantana defoliator caterpillar | Hypena strigatus (Fabricius) | LEPIDOPTERA | Noctuidae | Hypena | strigatus | (Fabricius) | |
| lantana gall fly | Eutreta xanthochaeta Aldrich | DIPTERA | Tephritidae | Eutreta | xanthochaeta | Aldrich | |
| lantana hispid | Uroplata girardi Pic | COLEOPTERA | Chrysomelidae | Uroplata | girardi | Pic | |
| lantana lace bug | Teleonemia scrupulosa Stål | HEMIPTERA | Tingidae | Teleonemia | scrupulosa | Stål | |
| lantana leaf beetle | Octotoma scabripennis Guérin-Méneville | COLEOPTERA | Chrysomelidae | Octotoma | scabripennis | Guérin-Méneville | |
| lantana leafminer | Cremastobombycia lantanella Busck | LEPIDOPTERA | Gracillariidae | Cremastobombycia | lantanella | Busck | |
| lantana leaftier | Salbia haemorrhoidalis Guenée | LEPIDOPTERA | Crambidae | Salbia | haemorrhoidalis | Guenée | |
| lantana plume moth | Lantanophaga pusillidactyla (Walker) | LEPIDOPTERA | Pterophoridae | Lantanophaga | pusillidactyla | (Walker) | |
| lantana seed fly | Ophiomyia lantanae (Froggatt) | DIPTERA | Agromyzidae | Ophiomyia | lantanae | (Froggatt) | |
| lantana stick caterpillar | Neogalea sunia (Guenée) | LEPIDOPTERA | Noctuidae | Neogalea | sunia | (Guenée) | |
| lappet moth | Phyllodesma americana (Harris) | LEPIDOPTERA | Lasiocampidae | Phyllodesma | americana | (Harris) | |
| larch aphid | Cinara laricis (Hartig) | HEMIPTERA | Aphididae | Cinara | laricis | (Hartig) | |
| larch casebearer | Coleophora laricella (Hübner) | LEPIDOPTERA | Coleophoridae | Coleophora | laricella | (Hübner) | |
| larch sawfly | Pristiphora erichsonii (Hartig) | HYMENOPTERA | Tenthredinidae | Pristiphora | erichsonii | (Hartig) | |
| larder beetle | Dermestes lardarius Linnaeus | COLEOPTERA | Dermestidae | Dermestes | lardarius | Linnaeus | |
| large aspen tortrix | Choristoneura conflictana (Walker) | LEPIDOPTERA | Tortricidae | Choristoneura | conflictana | (Walker) | |
| large bigeyed bug | Geocoris bullatus (Say) | HEMIPTERA | Geocoridae | Geocoris | bullatus | (Say) | |
| large brown spider | Heteropoda venatoria (Linnaeus) | ARANEAE | Sparassidae | Heteropoda | venatoria | (Linnaeus) | |
| large chestnut weevil | Curculio caryatrypes (Boheman) | COLEOPTERA | Curculionidae | Curculio | caryatrypes | (Boheman) | |
| large chicken louse | Goniodes gigas (Taschenberg) | PHTHIRAPTERA | Philopteridae | Goniodes | gigas | (Taschenberg) | |
| large cottony scale | Pulvinaria mammeae Maskell | HEMIPTERA | Coccidae | Pulvinaria | mammeae | Maskell | |
| large duck louse | Trinoton querquedulae (Linnaeus) | PHTHIRAPTERA | Menoponidae | Trinoton | querquedulae | (Linnaeus) | |
| large kissing bug | Triatoma rubrofasciata (De Geer) | HEMIPTERA | Reduviidae | Triatoma | rubrofasciata | (De Geer) | |
| large milkweed bug | Oncopeltus fasciatus (Dallas) | HEMIPTERA | Lygaeidae | Oncopeltus | fasciatus | (Dallas) | |
| large red slug | Arion ater rufus (Linnaeus) | STYLOMMATOPHORA | Arionidae | Arion | ater rufus | (Linnaeus) | |
| large turkey louse | Chelopistes meleagridis (Linnaeus) | PHTHIRAPTERA | Philopteridae | Chelopistes | meleagridis | (Linnaeus) | |
| larger black flour beetle | Cynaeus angustus (LeConte) | COLEOPTERA | Tenebrionidae | Cynaeus | angustus | (LeConte) | |
| larger canna leafroller | Calpodes ethlius (Stoll) | LEPIDOPTERA | Hesperiidae | Calpodes | ethlius | (Stoll) | |
| larger elm leaf beetle | Monocesta coryli (Say) | COLEOPTERA | Chrysomelidae | Monocesta | coryli | (Say) | |
| larger grain borer | Prostephanus truncatus (Horn) | COLEOPTERA | Bostrichidae | Prostephanus | truncatus | (Horn) | |
| larger Hawaiian cutworm | Agrotis crinigera (Butler) | LEPIDOPTERA | Noctuidae | Agrotis | crinigera | (Butler) | |
| larger lantana butterfly | Tmolus echion (Linnaeus) | LEPIDOPTERA | Lycaenidae | Tmolus | echion | (Linnaeus) | |
| larger Mexican pine beetle | Dendroctonus approximatus Dietz | COLEOPTERA | Scolytidae | Dendroctonus | approximatus | Dietz | |
| larger pale trogiid | Trogium pulsatorium (Linnaeus) | PSOCOPTERA | Trogiidae | Trogium | pulsatorium | (Linnaeus) | |
| larger shothole borer | Scolytus mali (Bechstein) | COLEOPTERA | Curculionidae | Scolytus | mali | (Bechstein) | |
| larger tamarisk beetle | Diorhabda carinata (Faldermann) | COLEOPTERA | Chrysomelidae | Diorhabda | carinata | (Faldermann) | |
| larger yellow ant | Acanthomyops interjectus (Mayr) | HYMENOPTERA | Formicidae | Acanthomyops | interjectus | (Mayr) | |
| larkspur leafminer complex* | Phytomyza spp. | DIPTERA | Agromyzidae | Phytomyza | spp. | *Includes Phytomyza aconti Hendel, P. delphiniae Frost, and P. delphinivora Spenser | |
| latania scale | Hemiberlesia lataniae (Signoret) | HEMIPTERA | Diaspididae | Hemiberlesia | lataniae | (Signoret) | |
| latrine fly | Fannia scalaris (Fabricius) | DIPTERA | Muscidae | Fannia | scalaris | (Fabricius) | |
| lawn armyworm | Spodoptera mauritia (Boisduval) | LEPIDOPTERA | Noctuidae | Spodoptera | mauritia | (Boisduval) | |
| lawn leafhopper | Deltocephalus hospes Kirkaldy | HEMIPTERA | Cicadellidae | Deltocephalus | hospes | Kirkaldy | |
| leadcable borer | Scobicia declivis (LeConte) | COLEOPTERA | Bostrichidae | Scobicia | declivis | (LeConte) | |
| leaf crumpler | Acrobasis indigenella (Zeller) | LEPIDOPTERA | Pyralidae | Acrobasis | indigenella | (Zeller) | |
| leaffooted bug | Leptoglossus phyllopus (Linnaeus) | HEMIPTERA | Coreidae | Leptoglossus | phyllopus | (Linnaeus) | |
| leaffooted pine seed bug | Leptoglossus corculus (Say) | HEMIPTERA | Coreidae | Leptoglossus | corculus | (Say) | |
| leafhopper assassin bug | Zelus renardii Kolenati | HEMIPTERA | Reduviidae | Zelus | renardii | Kolenati | |
| leek moth | Acrolepiopsis assectella (Zeller) | LEPIDOPTERA | Acrolepiidae | Acrolepiopsis | assectella | (Zeller) | |
| lemon cuckoo bumble bee | Bombus citrinus (Smith) | HYMENOPTERA | Apidae | Bombus | citrinus | (Smith) | |
| leopard moth | Zeuzera pyrina (Linnaeus) | LEPIDOPTERA | Cossidae | Zeuzera | pyrina | (Linnaeus) | |
| lespedeza webworm | Pococera scortealis (Lederer) | LEPIDOPTERA | Pyralidae | Pococera | scortealis | (Lederer) | |
| lesser appleworm | Grapholita prunivora (Walsh) | LEPIDOPTERA | Tortricidae | Grapholita | prunivora | (Walsh) | |
| lesser brown scorpion | Isometrus maculatus De Geer | SCORPIONES | Buthidae | Isometrus | maculatus | De Geer | |
| lesser bud moth | Recurvaria nanella Denis & Schiffermüller | LEPIDOPTERA | Gelechiidae | Recurvaria | nanella | Denis & Schiffermüller | |
| lesser bulb fly | Eumerus tuberculatus Rondani | DIPTERA | Syrphidae | Eumerus | tuberculatus | Rondani | |
| lesser canna leafroller | Geshna cannalis (Quaintance) | LEPIDOPTERA | Crambidae | Geshna | cannalis | (Quaintance) | |
| lesser clover leaf weevil | Hypera nigrirostris (Fabricius) | COLEOPTERA | Curculionidae | Hypera | nigrirostris | (Fabricius) | |
| lesser cornstalk borer | Elasmopalpus lignosellus (Zeller) | LEPIDOPTERA | Pyralidae | Elasmopalpus | lignosellus | (Zeller) | |
| lesser ensign wasp | Szepligetella sericea (Cameron) | HYMENOPTERA | Evaniidae | Szepligetella | sericea | (Cameron) | |
| lesser follicle mite | Demodex brevis Bulanova | ACARI | Demodicidae | Demodex | brevis | Bulanova | |
| lesser grain borer | Rhyzopertha dominica (Fabricius) | COLEOPTERA | Bostrichidae | Rhyzopertha | dominica | (Fabricius) | |
| lesser lawn leafhopper | Graminella sonora (Ball) | HEMIPTERA | Cicadellidae | Graminella | sonora | (Ball) | |
| lesser mealworm | Alphitobius diaperinus (Panzer) | COLEOPTERA | Tenebrionidae | Alphitobius | diaperinus | (Panzer) | |
| lesser orchid weevil | Orchidophilus peregrinator Buchanan | COLEOPTERA | Curculionidae | Orchidophilus | peregrinator | Buchanan | |
| lesser peachtree borer | Synanthedon pictipes (Grote & Robinson) | LEPIDOPTERA | Sesiidae | Synanthedon | pictipes | (Grote & Robinson) | |
| lesser wax moth | Achroia grisella (Fabricius) | LEPIDOPTERA | Pyralidae | Achroia | grisella | (Fabricius) | |
| lettuce root aphid | Pemphigus bursarius (Linnaeus) | HEMIPTERA | Aphididae | Pemphigus | bursarius | (Linnaeus) | |
| light brown apple moth | Epiphyas postvittana (Walker) | LEPIDOPTERA | Tortricidae | Epiphyas | postvittana | (Walker) | |
| lilac borer* | Podosesia syringae (Harris) | LEPIDOPTERA | Sesiidae | Podosesia | syringae | (Harris) | *Also called ash borer |
| lilac leafminer | Caloptilia syringella (Fabricius) | LEPIDOPTERA | Gracillariidae | Caloptilia | syringella | (Fabricius) | |
| lily bulb thrips | Liothrips vaneeckei Priesner | THYSANOPTERA | Phlaeothripidae | Liothrips | vaneeckei | Priesner | |
| lily leaf beetle | Lilioceris lilii (Scopoli) | COLEOPTERA | Chrysomelidae | Lilioceris | lilii | (Scopoli) | |
| lily weevil | Agasphaerops nigra Horn | COLEOPTERA | Curculionidae | Agasphaerops | nigra | Horn | |
| limabean pod borer | Etiella zinckenella (Treitschke) | LEPIDOPTERA | Pyralidae | Etiella | zinckenella | (Treitschke) | |
| limabean vine borer | Monoptilota pergratialis (Hulst) | LEPIDOPTERA | Pyralidae | Monoptilota | pergratialis | (Hulst) | |
| lime swallowtail | Papilio demoleus Linnaeus | LEPIDOPTERA | Papilionidae | Papilio | demoleus | Linnaeus | |
| linden borer | Saperda vestita Say | COLEOPTERA | Cerambycidae | Saperda | vestita | Say | |
| linden looper | Erannis tiliaria (Harris) | LEPIDOPTERA | Geometridae | Erannis | tiliaria | (Harris) | |
| lined click beetle | Agriotes lineatus (Linnaeus) | COLEOPTERA | Elateridae | Agriotes | lineatus | (Linnaeus) | |
| lined spittlebug | Neophilaenus lineatus (Linnaeus) | HEMIPTERA | Cercopidae | Neophilaenus | lineatus | (Linnaeus) | |
| lined stalk borer | Oligia fractilinea (Grote) | LEPIDOPTERA | Noctuidae | Oligia | fractilinea | (Grote) | |
| lion beetle | Ulochaetes leoninus LeConte | COLEOPTERA | Cerambycidae | Ulochaetes | leoninus | LeConte | |
| litchi fruit moth | Cryptophlebia ombrodelta (Lower) | LEPIDOPTERA | Tortricidae | Cryptophlebia | ombrodelta | (Lower) | |
| litchi mite | Aceria litchii (Keifer) | ACARI | Eriophyidae | Aceria | litchii | (Keifer) | |
| little black ant | Monomorium minimum (Buckley) | HYMENOPTERA | Formicidae | Monomorium | minimum | (Buckley) | |
| little blue cattle louse | Solenopotes capillatus (Enderlein) | PHTHIRAPTERA | Linognathidae | Solenopotes | capillatus | (Enderlein) | |
| little carpenterworm | Prionoxystus macmurtrei (Guenée) | LEPIDOPTERA | Cossidae | Prionoxystus | macmurtrei | (Guenée) | |
| little fire ant | Wasmannia auropunctata (Roger) | HYMENOPTERA | Formicidae | Wasmannia | auropunctata | (Roger) | |
| little green leafhopper | Balclutha incisa hospes (Kirkaldy) | HEMIPTERA | Cicadellidae | Balclutha | incisa hospes | (Kirkaldy) | |
| little house fly | Fannia canicularis (Linnaeus) | DIPTERA | Muscidae | Fannia | canicularis | (Linnaeus) | |
| little yellow ant | Plagiolepis alluaudi Emery | HYMENOPTERA | Formicidae | Plagiolepis | alluaudi | Emery | |
| loblolly pine sawfly | Neodiprion taedae linearis Ross | HYMENOPTERA | Diprionidae | Neodiprion | taedae linearis | Ross | |
| locust borer | Megacyllene robiniae (Förster) | COLEOPTERA | Cerambycidae | Megacyllene | robiniae | (Förster) | |
| locust leafminer | Odontota dorsalis (Thunberg) | COLEOPTERA | Chrysomelidae | Odontota | dorsalis | (Thunberg) | |
| locust leafroller | Sciota subcaesiella (Clemens) | LEPIDOPTERA | Pyralidae | Sciota | subcaesiella | (Clemens) | |
| locust twig borer | Ecdytolopha insiticiana Zeller | LEPIDOPTERA | Tortricidae | Ecdytolopha | insiticiana | Zeller | |
| lodgepole cone beetle* | Conophthorus ponderosae Hopkins | COLEOPTERA | Curculionidae | Conophthorus | ponderosae | Hopkins | *Also called ponderosa pine cone beetle and sugar pine cone beetle |
| lodgepole needleminer | Coleotechnites milleri (Busck) | LEPIDOPTERA | Gelechiidae | Coleotechnites | milleri | (Busck) | |
| lodgepole pine beetle | Dendroctonus murrayanae Hopkins | COLEOPTERA | Curculionidae | Dendroctonus | murrayanae | Hopkins | |
| lodgepole sawfly | Neodiprion burkei Middleton | HYMENOPTERA | Diprionidae | Neodiprion | burkei | Middleton | |
| lodgepole terminal weevil | Pissodes terminalis Hopping | COLEOPTERA | Curculionidae | Pissodes | terminalis | Hopping | |
| lone star tick | Amblyomma americanum (Linnaeus) | ACARI | Ixodidae | Amblyomma | americanum | (Linnaeus) | |
| long brown scale | Coccus longulus (Douglas) | HEMIPTERA | Coccidae | Coccus | longulus | (Douglas) | |
| longheaded flour beetle | Latheticus oryzae Waterhouse | COLEOPTERA | Tenebrionidae | Latheticus | oryzae | Waterhouse | |
| longleaf pine seedworm | Cydia ingens (Heinrich) | LEPIDOPTERA | Tortricidae | Cydia | ingens | (Heinrich) | |
| longlegged ant | Anoplolepis gracilipes (Fr. Smith) | HYMENOPTERA | Formicidae | Anoplolepis | gracilipes | (Fr. Smith) | |
| longnosed cattle louse | Linognathus vituli (Linnaeus) | PHTHIRAPTERA | Linognathidae | Linognathus | vituli | (Linnaeus) | |
| longtailed fruit fly parasite | Opius longicaudatus Ashmead | HYMENOPTERA | Braconidae | Opius | longicaudatus | Ashmead | |
| longtailed mealybug | Pseudococcus longispinus (Targioni Tozzetti) | HEMIPTERA | Pseudococcidae | Pseudococcus | longispinus | (Targioni Tozzetti) | |
| lotis blue | Lycaeides argyrognomon lotis (Lintner) | LEPIDOPTERA | Lycaenidae | Lycaeides | argyrognomon lotis | (Lintner) | |
| Louisiana red crayfish | Procambarus clarkii (Girard) | DECAPODA | Cambaridae | Procambarus | clarkii | (Girard) | |
| lowland tree termite | Incisitermes immigrans (Snyder) | ISOPTERA | Kalotermitidae | Incisitermes | immigrans | (Snyder) | |
| lubber grasshopper | Brachystola magna (Girard) | ORTHOPTERA | Romaleidae | Brachystola | magna | (Girard) | |
| luna moth | Actias luna (Linnaeus) | LEPIDOPTERA | Saturniidae | Actias | luna | (Linnaeus) | |
| Macao paper wasp | Polistes olivaceus (De Geer) | HYMENOPTERA | Vespidae | Polistes | olivaceus | (De Geer) | |
| Madeira cockroach | Leucophaea maderae (Fabricius) | BLATTODEA | Blaberidae | Leucophaea | maderae | (Fabricius) | |
| madeira mealybug | Phenacoccus madeirensis Green | HEMIPTERA | Pseudococcidae | Phenacoccus | madeirensis | Green | |
| magnolia scale | Neolecanium cornuparvum (Thro) | HEMIPTERA | Coccidae | Neolecanium | cornuparvum | (Thro) | |
| mahogany bark weevil | Macrocopturus floridanus (Fall) | COLEOPTERA | Curculionidae | Macrocopturus | floridanus | (Fall) | |
| mahogany leafminer | Phyllocnistis meliacella Becker | LEPIDOPTERA | Gracillariidae | Phyllocnistis | meliacella | Becker | |
| mahogany webworm | Macalla thyrsisalis Walker | LEPIDOPTERA | Pyralidae | Macalla | thyrsisalis | Walker | |
| maize billbug | Sphenophorus maidis Chittenden | COLEOPTERA | Curculionidae | Sphenophorus | maidis | Chittenden | |
| maize weevil | Sitophilus zeamais Motschulsky | COLEOPTERA | Curculionidae | Sitophilus | zeamais | Motschulsky | |
| mango bark beetle | Hypocryphalus mangiferae (Stebbing) | COLEOPTERA | Curculionidae | Hypocryphalus | mangiferae | (Stebbing) | |
| mango bud mite | Aceria mangiferae Sayed | ACARI | Eriophyidae | Aceria | mangiferae | Sayed | |
| mango flower beetle | Protaetia fusca (Herbst) | COLEOPTERA | Scarabaeidae | Protaetia | fusca | (Herbst) | |
| mango shoot caterpillar | Penicillaria jocosatrix Guenée | LEPIDOPTERA | Noctuidae | Penicillaria | jocosatrix | Guenée | |
| mango spider mite | Oligonychus mangiferus (Rahman & Sapra) | ACARI | Tetranychidae | Oligonychus | mangiferus | (Rahman & Sapra) | |
| mango weevil | Cryptorhynchus mangiferae (Fabricius) | COLEOPTERA | Curculionidae | Cryptorhynchus | mangiferae | (Fabricius) | |
| manzanita leafgall aphid | Tamalia coweni (Cockerell) | HEMIPTERA | Aphididae | Tamalia | coweni | (Cockerell) | |
| maple bladdergall mite | Vasates quadripedes Shimer | ACARI | Eriophyidae | Vasates | quadripedes | Shimer | |
| maple callus borer | Synanthedon acerni (Clemens) | LEPIDOPTERA | Sesiidae | Synanthedon | acerni | (Clemens) | |
| maple leafcutter | Paraclemensia acerifoliella (Fitch) | LEPIDOPTERA | Incurvariidae | Paraclemensia | acerifoliella | (Fitch) | |
| maple petiole borer | Caulocampus acericaulis (MacGillivray) | HYMENOPTERA | Tenthredinidae | Caulocampus | acericaulis | (MacGillivray) | |
| maple trumpet skeletonizer | Catastega aceriella Clemens | LEPIDOPTERA | Tortricidae | Catastega | aceriella | Clemens | |
| margined blister beetle | Epicauta funebris Horn | COLEOPTERA | Meloidae | Epicauta | funebris | Horn | |
| Maricopa harvester ant | Pogonomyrmex maricopa Wheeler | HYMENOPTERA | Formicidae | Pogonomyrmex | maricopa | Wheeler | |
| marsh slug | Deroceras laeve (Müller) | STYLOMMATOPHORA | Agriolimacidae | Deroceras | laeve | (Müller) | |
| masked hunter | Reduvius personatus (Linnaeus) | HEMIPTERA | Reduviidae | Reduvius | personatus | (Linnaeus) | |
| mauna loa bean beetle | Araeocorynus cumingi Jekel | COLEOPTERA | Anthribidae | Araeocorynus | cumingi | Jekel | |
| McDaniel spider mite | Tetranychus mcdanieli McGregor | ACARI | Tetranychidae | Tetranychus | mcdanieli | McGregor | |
| meadow plant bug | Leptopterna dolabrata (Linnaeus) | HEMIPTERA | Miridae | Leptopterna | dolabrata | (Linnaeus) | |
| meadow spittlebug | Philaenus spumarius (Linnaeus) | HEMIPTERA | Cercopidae | Philaenus | spumarius | (Linnaeus) | |
| meal moth | Pyralis farinalis Linnaeus | LEPIDOPTERA | Pyralidae | Pyralis | farinalis | Linnaeus | |
| mealy plum aphid | Hyalopterus pruni (Geoffroy) | HEMIPTERA | Aphididae | Hyalopterus | pruni | (Geoffroy) | |
| mealybug destroyer | Cryptolaemus montrouzieri Mulsant | COLEOPTERA | Coccinellidae | Cryptolaemus | montrouzieri | Mulsant | |
| Mediterranean flour moth | Ephestia kuehniella (Zeller) | LEPIDOPTERA | Pyralidae | Ephestia | kuehniella | (Zeller) | |
| Mediterranean fruit fly | Ceratitis capitata (Wiedemann) | DIPTERA | Tephritidae | Ceratitis | capitata | (Wiedemann) | |
| Mediterranean pine engraver | Orthotomicus erosus (Wollaston) | COLEOPTERA | Curculionidae | Orthotomicus | erosus | (Wollaston) | |
| Mediterranean recluse spider | Loxosceles rufescens (Dufour) | ARANEAE | Sicariidae | Loxosceles | rufescens | (Dufour) | |
| Mediterranean tamarisk beetle | Diorhabda elongata (Brullé) | COLEOPTERA | Chrysomelidae | Diorhabda | elongata | (Brullé) | |
| melastoma borer | Nola brunellus (Hampson) | LEPIDOPTERA | Nolidae | Nola | brunellus | (Hampson) | |
| melon aphid* | Aphis gossypii Glover | HEMIPTERA | Aphididae | Aphis | gossypii | Glover | *Also called cotton aphid |
| melon fly | Bactrocera cucurbitae Coquillett | DIPTERA | Tephritidae | Bactrocera | cucurbitae | Coquillett | |
| melonworm | Diaphania hyalinata (Linnaeus) | LEPIDOPTERA | Crambidae | Diaphania | hyalinata | (Linnaeus) | |
| merchant grain beetle | Oryzaephilus mercator (Fauvel) | COLEOPTERA | Silvanidae | Oryzaephilus | mercator | (Fauvel) | |
| Mexican bean beetle | Epilachna varivestis Mulsant | COLEOPTERA | Coccinellidae | Epilachna | varivestis | Mulsant | |
| Mexican bean weevil | Zabrotes subfasciatus (Boheman) | COLEOPTERA | Chrysomelidae | Zabrotes | subfasciatus | (Boheman) | |
| Mexican black scale | Saissetia miranda (Cockerell & Parrott) | HEMIPTERA | Coccidae | Saissetia | miranda | (Cockerell & Parrott) | |
| Mexican corn rootworm | Diabrotica virgifera zeae Krysan & Smith | COLEOPTERA | Chrysomelidae | Diabrotica | virgifera zeae | Krysan & Smith | |
| Mexican fruit fly | Anastrepha ludens (Loew) | DIPTERA | Tephritidae | Anastrepha | ludens | (Loew) | |
| Mexican lac scale | Tachardiella mexicana (Comstock) | HEMIPTERA | Kerriidae | Tachardiella | mexicana | (Comstock) | |
| Mexican leafroller | Amorbia emigratella Busck | LEPIDOPTERA | Tortricidae | Amorbia | emigratella | Busck | |
| Mexican mealybug | Phenacoccus gossypii Townsend & Cockerell | HEMIPTERA | Pseudococcidae | Phenacoccus | gossypii | Townsend & Cockerell | |
| Mexican rice borer | Eoreuma loftini (Dyar) | LEPIDOPTERA | Crambidae | Eoreuma | loftini | (Dyar) | |
| migratory grasshopper | Melanoplus sanguinipes (Fabricius) | ORTHOPTERA | Acrididae | Melanoplus | sanguinipes | (Fabricius) | |
| milfoil weevil | Euhrychiopsis lecontei (Dietz) | COLEOPTERA | Curculionidae | Euhrychiopsis | lecontei | (Dietz) | |
| mimosa webworm | Homadaula anisocentra Meyrick | LEPIDOPTERA | Galacticidae | Homadaula | anisocentra | Meyrick | |
| mining scale | Howardia biclavis (Comstock) | HEMIPTERA | Diaspididae | Howardia | biclavis | (Comstock) | |
| mint aphid | Ovatus crataegarius (Walker) | HEMIPTERA | Aphididae | Ovatus | crataegarius | (Walker) | |
| minute egg parasite | Trichogramma minutum Riley | HYMENOPTERA | Trichogrammatidae | Trichogramma | minutum | Riley | |
| minute pirate bug | Orius tristicolor (White) | HEMIPTERA | Anthocoridae | Orius | tristicolor | (White) | |
| mission blue | Icaricia icarioides missionensis (Hovanitz) | LEPIDOPTERA | Lycaenidae | Icaricia | icarioides missionensis | (Hovanitz) | |
| Modoc budworm | Choristoneura retiniana (Walshingham) | LEPIDOPTERA | Tortricidae | Choristoneura | retiniana | (Walshingham) | |
| mold mite | Tyrophagus putrescentiae (Schrank) | ACARI | Acaridae | Tyrophagus | putrescentiae | (Schrank) | |
| monarch butterfly | Danaus plexippus (Linnaeus) | LEPIDOPTERA | Danaidae | Danaus | plexippus | (Linnaeus) | |
| monkeypod moth | Polydesma umbricola Boisduval | LEPIDOPTERA | Noctuidae | Polydesma | umbricola | Boisduval | |
| monkeypod roundheaded borer | Xystrocera globosa (Olivier) | COLEOPTERA | Cerambycidae | Xystrocera | globosa | (Olivier) | |
| Monterey pine cone beetle | Conophthorus radiatae Hopkins | COLEOPTERA | Curculionidae | Conophthorus | radiatae | Hopkins | |
| Monterey pine resin midge | Cecidomyia resinicoloides Williams | DIPTERA | Cecidomyiidae | Cecidomyia | resinicoloides | Williams | |
| Monterey pine weevil | Pissodes radiatae Hopkins | COLEOPTERA | Curculionidae | Pissodes | radiatae | Hopkins | |
| Mormon cricket | Anabrus simplex Haldeman | ORTHOPTERA | Tettigoniidae | Anabrus | simplex | Haldeman | |
| morningglory leafminer | Bedellia somnulentella (Zeller) | LEPIDOPTERA | Bedellidae | Bedellia | somnulentella | (Zeller) | |
| Morrill lace bug | Corythucha morrilli Osborn & Drake | HEMIPTERA | Tingidae | Corythucha | morrilli | Osborn & Drake | |
| Morrison bumble bee | Bombus morrisoni Cresson | HYMENOPTERA | Apidae | Bombus | morrisoni | Cresson | |
| mossyrose gall wasp | Diplolepis rosae (Linnaeus) | HYMENOPTERA | Cynipidae | Diplolepis | rosae | (Linnaeus) | |
| mottled tortoise beetle | Deloyala guttata (Olivier) | COLEOPTERA | Chrysomelidae | Deloyala | guttata | (Olivier) | |
| mountain leafhopper | Colladonus montanus (Van Duzee) | HEMIPTERA | Cicadellidae | Colladonus | montanus | (Van Duzee) | |
| mountain pine beetle | Dendroctonus ponderosae Hopkins | COLEOPTERA | Curculionidae | Dendroctonus | ponderosae | Hopkins | |
| mountain pine coneworm | Dioryctria yatesi Mutuura & Munroe | LEPIDOPTERA | Pyralidae | Dioryctria | yatesi | Mutuura & Munroe | |
| mountain-ash sawfly | Pristiphora geniculata (Hartig) | HYMENOPTERA | Tenthredinidae | Pristiphora | geniculata | (Hartig) | |
| mourningcloak butterfly | Nymphalis antiopa (Linnaeus) | LEPIDOPTERA | Nymphalidae | Nymphalis | antiopa | (Linnaeus) | |
| mulberry whitefly | Tetraleurodes mori (Quaintance) | HEMIPTERA | Aleyrodidae | Tetraleurodes | mori | (Quaintance) | |
| mullein thrips | Haplothrips verbasci (Osborn) | THYSANOPTERA | Phlaeothripidae | Haplothrips | verbasci | (Osborn) | |
| multicolored Asian lady beetle | Harmonia axyridis (Pallas) | COLEOPTERA | Coccinellidae | Harmonia | axyridis | (Pallas) | |
| Nantucket pine tip moth | Rhyacionia frustrana (Comstock) | LEPIDOPTERA | Tortricidae | Rhyacionia | frustrana | (Comstock) | |
| narcissus bulb fly | Merodon equestris (Fabricius) | DIPTERA | Syrphidae | Merodon | equestris | (Fabricius) | |
| narrownecked grain beetle | Anthicus floralis (Linnaeus) | COLEOPTERA | Anthicidae | Anthicus | floralis | (Linnaeus) | |
| narrowwinged mantid | Tenodera augustipennis Saussure | MANTODEA | Mantidae | Tenodera | augustipennis | Saussure | |
| native elm bark beetle | Hylurgopinus rufipes (Eichhoff) | COLEOPTERA | Curculionidae | Hylurgopinus | rufipes | (Eichhoff) | |
| native holly leafminer | Phytomyza ilicicola Loew | DIPTERA | Agromyzidae | Phytomyza | ilicicola | Loew | |
| navel orangeworm | Amyelois transitella (Walker) | LEPIDOPTERA | Pyralidae | Amyelois | transitella | (Walker) | |
| Nevada bumble bee | Bombus nevadensis Cresson | HYMENOPTERA | Apidae | Bombus | nevadensis | Cresson | |
| Nevada sage grasshopper | Melanoplus rugglesi Gurney | ORTHOPTERA | Acrididae | Melanoplus | rugglesi | Gurney | |
| New Guinea sugarcane weevil | Rhabdoscelus obscurus (Boisduval) | COLEOPTERA | Curculionidae | Rhabdoscelus | obscurus | (Boisduval) | |
| new house borer | Arhopalus productus (LeConte) | COLEOPTERA | Cerambycidae | Arhopalus | productus | (LeConte) | |
| New York weevil | Ithycerus noveboracensis (Förster) | COLEOPTERA | Ithyceridae | Ithycerus | noveboracensis | (Förster) | |
| nigra scale | Parasaissetia nigra (Nietner) | HEMIPTERA | Coccidae | Parasaissetia | nigra | (Nietner) |